Melos Light Viola Rosin is one of the world's finest rosins. Melos rosin contain no chemicals of any kind or fillers like glucose or sugars. Melos rosins are formulated for specific instruments and seasons, softer dark for winter and harder light for summer. Because it is 100% handmade in small batches, it is always fresh. High quality Melos rosin, made of Greek pine-tree colophony, is produced by Sykiotis in Greece. This is a harder light viola rosin suitable for summer.